| 摘要 |
A process for preparing builder granules suitable for use in a granular or tabletted detergent compositions, particularly for machine dishwash, involves forming a slurry of solid and aqueous MGDA Na3 spray dryer, under non-agglomerating conditions, to form spray dried particles comprising solid crystalline MGDA Na 3 dihydrate, compacting the spray dried particles into compacted aggregates and comminuting the compacted aggregates into granular particles to form builder granules having a particle size distribution suitable for use in a granular detergent composition. Prior to spray drying, the slurry is maintained at a slurry temperature of 20° or more for sufficient time for the resulting builder granules to remain free flowing after 48 hours storage at 20° C. and 65% relative humidity. The resulting granules, made by an efficient process, using conventional detergent manufacturing apparatus, exhibit excellent resistance to caking when damp and can be incorporated into granular detergent compositions or detergent tablets, such as machine dishwash compositions or tablets, without substantial degradation of flow or stickiness (for granular compositions) and without substantial reduction in friability or disintegration (for tabletted compositions). |
